The narrative follows a group of young riders who travel to a remote ranch in the Coso Valley for a summer outing. They meet eccentric guides and local ranch hands, then face horse theft and escalating rustler attacks that force them to organize defenses and collaborate with ranchers. The story charts small battles, a serious wound that requires first aid, recovery of stolen ponies, and tactical ruses to outwit the outlaws. Alongside the action are scenes of campboard camaraderie, practical problem-solving, and conversations about friendship and budding romance, conveyed with light humor and frontier detail.